peace lily problems HELP!!!!: These are my peace lilys and they are in need of...

peace lily problems HELP!!!!:
 These are my peace lilys and they are in need of...:  These are my peace lilys and they are in need of HELP!!!! I dont know what to do as you can see they have brown and yellow spots on th...

 These are my peace lilys and they are in need of HELP!!!! I dont know what to do as you can see they have brown and yellow spots on them and when i first brought them they where much fuller and had lilys on them now only one plant has a lily. I really could use the help they are such pretty plants. Can anyone tell me what Im doing wrong??!!!??? Shadae.